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प्रश्न
Intensity of electric field at a point close to and outside a charged conducting cylinder is proportional to ______. (r is the distance of a point from the axis of cylinder)
(A) `1/r`
(B) `1/r^2`
(C) `1/r^3`
(D) r3
उत्तर
(a) `1/r`
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